Thats EXACTLY what I used.
chopped a bit off, including the side headlights, repainted the whole thing including the wheels repositioned the spring to under the seat. added a whole lot of weathering. sculpted the leather bits on the side, added metal ribbing to the side and the original triumph logo. I'll see i i can post some more pics in the next few days. I posted my work awhile ago but nobody seemed to care until now apparently.
This is the actual color of the bike...
this is NOT the T bird. It's his stunt man's bike. I't not a triumph at all. It's why a few people think the color is red when it's not...
The triumph bonnyville that is out there is simply not as accurate as the Indian when modified. I wouldn't even bother with that. But you're going to need to do a lot of work on the Indian.